/Engine/Source/Developer/SourceControl/Public/SourceControlFileStatusMonitor.h
Returns the file status age, i.e. (now - last_status_update) if the file is monitored. If the initial status request hasn't been received yet, returns zero.
[TOptional](API\Runtime\Core\IO\TOptional)< [FTimespan](API\Runtime\Core\Misc\FTimespan) > GetStatusAge ( const [FString](API\Runtime\Core\Containers\FString) & AbsPathname ) const